Infrared-laser-induced periodic surface structure in azo-dye polymer

Second-harmonic and third-harmonic waves that are generated in an azo-polymer form diffraction patterns without any material deformation. The source is a single IR laser beam at λ=1064 nm that is weakly absorbed by the polymer. If the IR power is sufficiently high, laser-induced periodic (700 nm) st...

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Veröffentlicht in:Applied physics letters 2004-05, Vol.84 (22), p.4511-4513
Hauptverfasser: Ivanov, Mario, Rochon, Paul
Format: Artikel
Sprache:eng
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Zusammenfassung:Second-harmonic and third-harmonic waves that are generated in an azo-polymer form diffraction patterns without any material deformation. The source is a single IR laser beam at λ=1064 nm that is weakly absorbed by the polymer. If the IR power is sufficiently high, laser-induced periodic (700 nm) structures grow on the polymer surface and give rise to distinctive diffraction patterns in the visible and ultraviolet. If the IR power is low, there are no surface changes but diffraction patterns that have the same shape still appear.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.1757640